From The Aquarium Wiki
Also known as Niacin and Nicotinamide.
What it Does
Aids healthy growth rate, improves eyesight & aids in the protection of skin. Also known to aid fertility.
Symptoms of Deficiency
Poor growth( reduced food conversion efficiency), lack of appetite, dark pigment, erratic swimming, muscle spasms while resting, oedema (Edema (American English) or Oedema (British English), formerly known as dropsy or hydropsy) of stomach.
Feed your animal at least three different types of food. This will ensure it gets adequate supply of this vitamin.
- Don't use old food. Vitamins decay very rapidly once exposed to the air, heat or being frozen. Try to feed food that is no more than 6 months old.